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Does surface roughness influence the primary stability of acetabular cups? A numerical and experimental biomechanical evaluation.

Le Cann, Sophie LU ; Galland, Alexandre; Rosa, Benoit; Le Corroller, Thomas; Pithioux, Martine; Argenson, Jean-Noël; Chabrand, Patrick and Parratte, Sébastien (2014) In Medical Engineering & Physics 36(9). p.1185-1190
Abstract
Most acetabular cups implanted today are press-fit impacted cementless. Anchorage begins with the primary stability given by insertion of a slightly oversized cup. This primary stability is key to obtaining bone ingrowth and secondary stability. We tested the hypothesis that primary stability of the cup is related to surface roughness of the implant, using both an experimental and a numerical models to analyze how three levels of surface roughness (micro, macro and combined) affect the primary stability of the cup. We also investigated the effect of differences in diameter between the cup and its substrate, and of insertion force, on the cups' primary stability. The results of our study show that primary stability depends on the surface... (More)
Most acetabular cups implanted today are press-fit impacted cementless. Anchorage begins with the primary stability given by insertion of a slightly oversized cup. This primary stability is key to obtaining bone ingrowth and secondary stability. We tested the hypothesis that primary stability of the cup is related to surface roughness of the implant, using both an experimental and a numerical models to analyze how three levels of surface roughness (micro, macro and combined) affect the primary stability of the cup. We also investigated the effect of differences in diameter between the cup and its substrate, and of insertion force, on the cups' primary stability. The results of our study show that primary stability depends on the surface roughness of the cup. The presence of macro-roughness on the peripheral ring is found to decrease primary stability; there was excessive abrasion of the substrate, damaging it and leading to poor primary stability. Numerical modeling indicates that oversizing the cup compared to its substrate has an impact on primary stability, as has insertion force. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Medical Engineering & Physics
volume
36
issue
9
pages
1185 - 1190
publisher
Elsevier
external identifiers
  • scopus:84906056111
ISSN
1350-4533
DOI
10.1016/j.medengphy.2014.07.003
language
English
LU publication?
no
id
4ecad6c3-7dc1-4c60-90d0-8a8bb2e8b012
date added to LUP
2017-02-15 10:55:59
date last changed
2017-11-19 04:37:39
@article{4ecad6c3-7dc1-4c60-90d0-8a8bb2e8b012,
  abstract     = {Most acetabular cups implanted today are press-fit impacted cementless. Anchorage begins with the primary stability given by insertion of a slightly oversized cup. This primary stability is key to obtaining bone ingrowth and secondary stability. We tested the hypothesis that primary stability of the cup is related to surface roughness of the implant, using both an experimental and a numerical models to analyze how three levels of surface roughness (micro, macro and combined) affect the primary stability of the cup. We also investigated the effect of differences in diameter between the cup and its substrate, and of insertion force, on the cups' primary stability. The results of our study show that primary stability depends on the surface roughness of the cup. The presence of macro-roughness on the peripheral ring is found to decrease primary stability; there was excessive abrasion of the substrate, damaging it and leading to poor primary stability. Numerical modeling indicates that oversizing the cup compared to its substrate has an impact on primary stability, as has insertion force.},
  author       = {Le Cann, Sophie and Galland, Alexandre and Rosa, Benoit and Le Corroller, Thomas and Pithioux, Martine and Argenson, Jean-Noël and Chabrand, Patrick and Parratte, Sébastien},
  issn         = {1350-4533},
  language     = {eng},
  number       = {9},
  pages        = {1185--1190},
  publisher    = {Elsevier},
  series       = {Medical Engineering & Physics},
  title        = {Does surface roughness influence the primary stability of acetabular cups? A numerical and experimental biomechanical evaluation.},
  url          = {http://dx.doi.org/10.1016/j.medengphy.2014.07.003},
  volume       = {36},
  year         = {2014},
}